Improving the quality of life for Earth's growing population is a complex task that requires the development of new technologies and materials. Perhaps the biggest challenge is access to clean and renewable energy...Improving the quality of life for Earth's growing population is a complex task that requires the development of new technologies and materials. Perhaps the biggest challenge is access to clean and renewable energy sources that can drive a sustainable future. Photovoltaics, today mainly represented by silicon-based solar cells, convert solar energy into electricity and is already an important component in the renewable energy portfolio.展开更多
1.INTRODUCTION Materials profoundly influence daily life,shaping trans-portation,housing,clothing,communication,and food production.Historically,the development of new materials has marked key stages of civilization,f...1.INTRODUCTION Materials profoundly influence daily life,shaping trans-portation,housing,clothing,communication,and food production.Historically,the development of new materials has marked key stages of civilization,from the Stone Age and Bronze Age to the Iron Age and Silicon Age,driving technological and societal progress.Materials science,emerg-ing as a distinct discipline in 1959,integrates knowledge from metallurgy,ceramic engineering,chemical engineering,and solid-state physics,focusing on the relationship between microstructure and properties.One successful example is the efforts in exploring high-strength and high-toughness materials.Recent advancements,such as nanotwinned copper1 and dual-phase silicon nitride exhibiting tensile deformation,highlight the critical role of microstructure in material performance.展开更多
The State Council recently printed and distributed the Notice on the‘Development Plan of National Strategic Emerging Industries for the'Thirteenth Five Year Plan'’(The Plan),which made overall deployment and...The State Council recently printed and distributed the Notice on the‘Development Plan of National Strategic Emerging Industries for the'Thirteenth Five Year Plan'’(The Plan),which made overall deployment and arrangement for development target,key tasks,展开更多
Non-Hermitian topology provides an emergent research frontier for studying unconventional topological phenomena and developing new materials and applications.Here,we study the non-Hermitian Chern bands and the associa...Non-Hermitian topology provides an emergent research frontier for studying unconventional topological phenomena and developing new materials and applications.Here,we study the non-Hermitian Chern bands and the associated non-Hermitian skin effects in Floquet checkerboard lattices with synthetic gauge fluxes.Such lattices can be realized in a network of coupled resonator optical waveguides in two dimensions or in an array of evanescently coupled helical optical waveguides in three dimensions.Without invoking nonreciprocal couplings,the system exhibits versatile non-Hermitian topological phases that support various skin-topological effects.Remarkably,the non-Hermitian skin effect can be engineered by changing the symmetry,revealing rich non-Hermitian topological bulk-boundary correspondences.Our system offers excellent controllability and experimental feasibility,making it appealing for exploring diverse non-Hermitian topological phenomena in photonics.展开更多
基金financially supported by the National Science Foundation of China grant (62322407, 22279034, 52261145698, W2421103)Shanghai Science and Technology Innovation Action Plan (22ZR1418900, 24110714100)+1 种基金the Swedish Research Council (project grant no. 2020-04538)the Swedish Government Strategic Research Area in Materials Science on Functional Materials at Link?ping University (Faculty Grant SFO Mat LiU no. 2009 00971)。
文摘Improving the quality of life for Earth's growing population is a complex task that requires the development of new technologies and materials. Perhaps the biggest challenge is access to clean and renewable energy sources that can drive a sustainable future. Photovoltaics, today mainly represented by silicon-based solar cells, convert solar energy into electricity and is already an important component in the renewable energy portfolio.
基金support was provided by the National Natural Science Foundation of China(92463310,92163212,and 52473235)Natural Science Foundation of China for Distinguished Young Scholars(T2425012)+5 种基金National Key R&D Program of China(2022YFA1203400)High Level of Special Funds(G03050K002)Guangdong Provincial Key Laboratory of Computational Science and Material Design(2019B030301001)Guangdong Provincial Key Laboratory of Functional Oxide Materials and Devices(2021B1212040001)Key-Area Research and Development Program of Guangdong Province(2024B0101040002)Shenzhen Innovation Program for Distinguished Young Scholars(RCJC20210706091949018).
文摘1.INTRODUCTION Materials profoundly influence daily life,shaping trans-portation,housing,clothing,communication,and food production.Historically,the development of new materials has marked key stages of civilization,from the Stone Age and Bronze Age to the Iron Age and Silicon Age,driving technological and societal progress.Materials science,emerg-ing as a distinct discipline in 1959,integrates knowledge from metallurgy,ceramic engineering,chemical engineering,and solid-state physics,focusing on the relationship between microstructure and properties.One successful example is the efforts in exploring high-strength and high-toughness materials.Recent advancements,such as nanotwinned copper1 and dual-phase silicon nitride exhibiting tensile deformation,highlight the critical role of microstructure in material performance.
文摘The State Council recently printed and distributed the Notice on the‘Development Plan of National Strategic Emerging Industries for the'Thirteenth Five Year Plan'’(The Plan),which made overall deployment and arrangement for development target,key tasks,
文摘Non-Hermitian topology provides an emergent research frontier for studying unconventional topological phenomena and developing new materials and applications.Here,we study the non-Hermitian Chern bands and the associated non-Hermitian skin effects in Floquet checkerboard lattices with synthetic gauge fluxes.Such lattices can be realized in a network of coupled resonator optical waveguides in two dimensions or in an array of evanescently coupled helical optical waveguides in three dimensions.Without invoking nonreciprocal couplings,the system exhibits versatile non-Hermitian topological phases that support various skin-topological effects.Remarkably,the non-Hermitian skin effect can be engineered by changing the symmetry,revealing rich non-Hermitian topological bulk-boundary correspondences.Our system offers excellent controllability and experimental feasibility,making it appealing for exploring diverse non-Hermitian topological phenomena in photonics.
